valter/dosbox-staging
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Allow an autoinit transfer to go over into a single cycle transfer

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Fixes Paddlers.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4066
This commit is contained in:
Sjoerd van der Berg 2017-12-08 15:31:59 +00:00
parent 75568f7d90
commit d949fee410
1 changed files with 38 additions and 18 deletions
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56
src/hardware/sblaster.cpp
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@ -396,8 +396,10 @@ static void GenerateDMASound(Bitu size) {
Bitu read=0;Bitu done=0;Bitu i=0;
if(sb.dma.autoinit) {
if (sb.dma.left <= size) size = sb.dma.left;
} else if (sb.dma.left <= sb.dma.min) size = sb.dma.left;
if (sb.dma.left <= size)
size = sb.dma.left;
} else if (sb.dma.left <= sb.dma.min)
size = sb.dma.left;
switch (sb.dma.mode) {
case DSP_DMA_2:
@ -503,14 +505,22 @@ static void GenerateDMASound(Bitu size) {
sb.dma.left-=read;
if (!sb.dma.left) {
PIC_RemoveEvents(END_DMA_Event);
if (sb.dma.mode >= DSP_DMA_16) SB_RaiseIRQ(SB_IRQ_16);
else SB_RaiseIRQ(SB_IRQ_8);
if (sb.dma.mode >= DSP_DMA_16)
SB_RaiseIRQ(SB_IRQ_16);
else
SB_RaiseIRQ(SB_IRQ_8);
//Copy the new size
sb.dma.left = sb.dma.total;
if (!sb.dma.autoinit) {
LOG(LOG_SB,LOG_NORMAL)("Single cycle transfer ended");
sb.mode=MODE_NONE;
sb.dma.mode=DSP_DMA_NONE;
if (!sb.dma.left) {
LOG(LOG_SB, LOG_NORMAL)("Single cycle transfer ended");
sb.mode = MODE_NONE;
sb.dma.mode = DSP_DMA_NONE;
}
else {
LOG(LOG_SB, LOG_NORMAL)("Switch to Single cycle transfer begun");
}
} else {
sb.dma.left=sb.dma.total;
if (!sb.dma.left) {
LOG(LOG_SB,LOG_NORMAL)("Auto-init transfer with 0 size");
sb.mode=MODE_NONE;
@ -544,7 +554,8 @@ static void DMA_Silent_Event(Bitu val) {
if (!sb.dma.left) {
if (sb.dma.mode >= DSP_DMA_16) SB_RaiseIRQ(SB_IRQ_16);
else SB_RaiseIRQ(SB_IRQ_8);
if (sb.dma.autoinit) sb.dma.left=sb.dma.total;
if (sb.dma.autoinit)
sb.dma.left=sb.dma.total;
else {
sb.mode=MODE_NONE;
sb.dma.mode=DSP_DMA_NONE;
@ -586,15 +597,26 @@ static void DSP_RaiseIRQEvent(Bitu /*val*/) {
SB_RaiseIRQ(SB_IRQ_8);
}
static void DSP_DoDMATransfer(DMA_MODES mode,Bitu freq,bool stereo) {
static void DSP_DoDMATransfer(DMA_MODES mode,Bitu freq,bool autoinit, bool stereo) {
char const * type;
sb.mode=MODE_DMA_MASKED;
//Fill up before changing state?
sb.chan->FillUp();
sb.dma.left=sb.dma.total;
//No active autoinit transfer then just assume it's a completely new one
if (sb.mode != MODE_DMA || !sb.dma.autoinit) {
sb.dma.left = sb.dma.total;
//The new transfer won't be autoinit so can clear the total now
if (!autoinit) {
sb.dma.total = 0;
}
//Starting a new transfer might as well clear the irq's
sb.irq.pending_8bit = false;
sb.irq.pending_16bit = false;
}
sb.mode = MODE_DMA_MASKED;
sb.dma.mode=mode;
sb.dma.stereo=stereo;
sb.irq.pending_8bit=false;
sb.irq.pending_16bit=false;
sb.dma.autoinit = autoinit;
switch (mode) {
case DSP_DMA_2:
type="2-bits ADPCM";
@ -642,18 +664,16 @@ static void DSP_DoDMATransfer(DMA_MODES mode,Bitu freq,bool stereo) {
}
static void DSP_PrepareDMA_Old(DMA_MODES mode,bool autoinit,bool sign) {
sb.dma.autoinit=autoinit;
sb.dma.sign=sign;
if (!autoinit) sb.dma.total=1+sb.dsp.in.data[0]+(sb.dsp.in.data[1] << 8);
sb.dma.chan=GetDMAChannel(sb.hw.dma8);
DSP_DoDMATransfer(mode,sb.freq / (sb.mixer.stereo ? 2 : 1),sb.mixer.stereo);
DSP_DoDMATransfer(mode,sb.freq / (sb.mixer.stereo ? 2 : 1), autoinit, sb.mixer.stereo);
}
static void DSP_PrepareDMA_New(DMA_MODES mode,Bitu length,bool autoinit,bool stereo) {
Bitu freq=sb.freq;
//equal length if data format and dma channel are both 16-bit or 8-bit
sb.dma.total=length;
sb.dma.autoinit=autoinit;
if (mode==DSP_DMA_16) {
if (sb.hw.dma16!=0xff) {
sb.dma.chan=GetDMAChannel(sb.hw.dma16);
@ -671,7 +691,7 @@ static void DSP_PrepareDMA_New(DMA_MODES mode,Bitu length,bool autoinit,bool ste
sb.dma.total<<=1;
}
} else sb.dma.chan=GetDMAChannel(sb.hw.dma8);
DSP_DoDMATransfer(mode,freq,stereo);
DSP_DoDMATransfer(mode,freq,autoinit,stereo);
}